FS2000 is great the only thing is I changed the iron sites out for the HK style sites. They work great here is my 2000 with the sites. I also run the HK mags. no problem with any commercial or surpluss ammo. Just took me time to get use to the distraction of having the spent rounds drop out of the front.
I have a reverse engineering business so I am working on making me a new front grip for the 2000 with rails. When I get some designs I will ask what you guys think. Just no time to get lots of progress on the project.